Subtract 72/7 from 63/40
1st number: 1 23/40, 2nd number: 10 2/7
63/40 - 72/7 is -2439/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 7 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
63/40 = 63 × 7/40 × 7 = 441/280 - Likewise, for the 2nd fraction, since 7 × 40 = 280,
72/7 = 72 × 40/7 × 40 = 2880/280 - Subtract the two like fractions:
441/280 - 2880/280 = 441 - 2880/280 = -2439/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/80-72/7 63/40-72/14 63/40-72/21 63/40-72/35 63/40-72/49